Planetary threaded drive for use in machine tool, has planetary unit arranged between nut and spindle, and lubrication channel comprising opening in area of inner profile of nut, where recess formed at opening is deeper than inner profile

摘要

The drive (10) has a nut (20), and a spindle (30) extended along a longitudinal axis (11) and provided with an outer profile (31). The nut surrounds the spindle and has an inner profile (21). A planetary unit (40) extends parallel to the axis, and arranged between the nut and the spindle such that an outer profile (42) of the unit is engaged into the profiles of the spindle and nut. A lubrication channel (60) is formed at the nut, and has an opening in an area of the profile of the nut. A recess formed at the opening is deeper than the profile of the nut, where the nut is made from steel.